Walk Roll Map Visualize

Visualizations for Walk Roll Map.

• First draft is for infographics.
• Later selected graphs may be added to website visualizations page.
  • BikeMaps.org provides an example to follow.

Map markers and heatmap

The heatmap might not make as much sense as it does for BikeMaps, because the reports on Walk Roll Map are more dispersed. Note that we can add opacity in a later step (using Javascript) so it looks exactly like on BikeMaps. We can also style the markers to match Walk Roll Map (this is a rough draft).

To do: connect the graphs to the map extent to spatially subset the data.

Reports by type

Colours match Walk Roll Map legend.

Reports by day of week

Reports by hour

Need to consider timezones. Add UTC offset to get local timezone.

• timezones: https://github.com/evansiroky/timezone-boundary-builder/releases
• timezone offsets: http://joda-time.sourceforge.net/timezones.html

Reports by day of year

Top reports

Tree maps

Tree maps show proportions as a set of nested rectangles. The area is proportional to the number of reports.

There is a lot of information - maybe too much!

This is an interactive version of the tree map above:

Amenity type tree map

Hazard type tree map

Incident type tree map

Frequency of keywords in description

This section analyses the free text description field.

• The reference for this section is the tidytext book.
• The figures are directly out of the book.

Most frequent words in desciption

Amenity

Hazard/Concern

Incident

Term frequency and inverse document frequency

These graphs show which words are unique to each type of report.